Appaeat o s s ob adbing- to the output os  a main power station the output



June 16, 1925. R 16,099

5. D. SPRONG APPARATUS FOR ADDING To THE OUTPUT OF A MAIUPOWER STATION,THE OUTPUT OF ONE OR MORE DISTANT SOURCES Original Filed April 12, 1918INVENTOR Je Q/W0. jpro/y AT TQRNEY WITNESSES:

Reissued June 16, 1925.

' UNITED STATES PATENT OFFICE.

; 7 SEVEN D. SPRONG, OF BROOKLYN, YORK, ASSIGNOB T WESTINGHOUSE ELEG-TRIC & MANUFACTURING GOMPANY, A CORPORATION OF PENNSYLVANIA.

APPARATUS FOR ADDING TO THE OUTPUT OF A MAIN POWER STATION THE OUTPUT933' ONE OR MORE DISTANT SOURCES.

- Original N0. 1,3fi9,276, dated January 27, 1920, Serial No. 228,078,filed April 12, 1918. Application for reissue filed September 14, 1921.

- Output of One or More Distant Sources, of

which the following is n specification.

It frecuentlyhappens that while in a certain territory there may beseveral separated sources of. water power, a combinntion of all or:them, or even of some number less than all, is impracticable hecause theexpense is found not justified by the gain in power. Hence some onesource of power is usually selected, and the single generating plant, islocated in its immediate proximityf- Such a; condition "arise, forexample, on a river or stream where there is a success falls; some onefalls, where the g head is available, being chosen.

It is, however, generally recogn ed that if auxiliary generating plantsof relatively low cost hoth of installation 51nd operation could beE'Stfll'ilislled at one or more of the secondary power sites, thegeneral gain will justify the enterprise, and especially if theauxiliary installation can be controllei'l directly from the main-powerstation.

This is the, problem which now solved by my present invention.

In the accompanying drawing;

Figure l is illustrative diagrzun,shmv- F ing the loc ,ion of the mainand the distant auxiliary stations.

Fig. 2 an electrical. diagram, showing the ap ia-rntus and circuits ofthe system.

For purpose of illustration, I will assume that the main station A. is,located at the high falls l3 of"v river and there receives power, and tthe auxiliary station C is E! located at anc receiv power ruin the lowfalls D,- distunt 'ills B.

Atthe station 1 chronous generator 1, actuated by a waterwheel,indicated at Generator It delivers to the bus 3, to whici. is connected,the main transmission line 4 and the auxiliary line 5 comniunicatingwith station C.

At station C is a watenwheel, indicated is n three-phase syn- Serial No.500,670.

at 6, which is driven by thewater coming through pipe/T, in which pipeis a rotary gate-valve 8. ater-Wheel 6 drives a threephase inductiongenerator 9, here of the squirrel cage t e. g

In the auxiliary line 5 is connected a manually controllable three-phaseautotransformer-10, an oil switch 11, and current transformers 12, saidcurrent transformers being connected to the coils of a relay The tripcoil ll of the .oil switch is connected to a source of direct currentsupply and to the liked terminals of relay 13.

The gate-valve 8 at station C is controlled by an electric motor 15connected to line 5 On the shaft of said motor is a bevel pinionengaging gear 16 on the stem of valve'& Also on said motorslieft is astepped cone pulley 17, on which is wound the cord 18 which, afterpassing over fixed pulley 19, carries a counter-weight :20.

The operation is follows:

The operator at the main stationA sets the autotransformer at minimumvoltage, as shown in Fig. 2. He also manually closes oil switch 11.

plied to it, begins to rotate as a motor. The

motor at station C receiving low voltage makes turns until its torque iscounterbalanced by weight 20. Valve 8 is thus partially opened, allowinga small amount ofauxiliary generator delivering energy tothe maintransmission line 4, and s0 supplementing the output of the generator 1at the main station A, and thus utilizing thepower of the falls at D. iShould an accident, such as a short The induction generator 9 at stationC then having voltage upunit, occur on the line 5 between the stations,the oil switch ll controlled by overload relay 13 immediately opensbecause of the excess current {lowing into that circuit from the maingenerating station. No exciting current can then pass to inductiongenerator 9 or motor 15, and the auxiliary station G becomeselectrically dead. The counterweight then rotates clertric motor 15 inthe reverse direction, which closes valve 8, sorshutting oil the watersupply to wheel 6, and the whole apparatus at the auxiliary station Ccomes to rest without shock or damage.

In case the operator at the main station wishes to obtain from theauxiliary station less than its maximumoutput, he does not bring theconnecting line to maxinnun volt- 'here shown as installed at theauxiliary stat-ion C requires no independent excita-- tion, no voltagecontrol, and no speed coir trol', Nor does it have to be synchronizedwhen. connected to the line, not" is it fixed as: to frequency. This isdue to the fact that the generator is excited from out of phase usecurrent taken from the live line to which it is connected. Thevoltageand frequency of such, live line determined the voltage and frequency ofthe induction generator, and it is only necessary in order to have thegenerator to act as a true igenerator and send out current at roper votage and frequency that it be riven slightly above] synchronism, ashereinbefore described. Such excess speed above synchronism what Imay becalled a positive slip and corresponds to the negative slip of the samemachine when operating as, an induction motor.

From all the forego'ing it will be seen that I not only secure the wholeor partial output of the auxiliary station C, but also control theapparatus at said station. from the main station A, thus eliminating anymanual control or personal supervision of said npparatusby attendants atthe auxiliary installations.

I have herein shown in Fig. 1 a second auxiliary station E, connected bytransmission line 21. Any number of such stations, distant from mainstation A and from one another, may be independently connected by theirown transmission lines to bus 3, so

that all of said auxiliary stations, if do sired, or a selected numberof them, may be caused to contribute their output to that of the mainstation. I

it is also observed that the transmission of power and ot' controlbetween the main power station and the auxiliary power station isaccomplished over a single auxiliary-41ers polypliase transmissionline;-

and that if a plurality ofauxiliary stations,

distant from the main station and from one i another, be present, thenthe transmission of power and of control takes place between the mainpower station and all or any norm her of the auxiliary stations throughthe single lines eonnectingsaid main station with said auxiliarystations. I

I claim as my invention:

1. A main generating plant, an auxiliary generating plant distant fromsaid main plant, a single transmission line connecting said plants.means connected in. and operat-.- mg through said transmiss on line forcansmg said auxiliary plant to add ts output through said transmissionline to the output of said main plant and means at said main plant forcontrolling said operating means.

3. method of'controllinfrom a.

"main generating plant. a given power station, an auxiliary generatingplant at a distant power station electrically connected to said. mainstation. and of causing said auxiliary plant to its output to the outputof said main station. which consists in first actuating the s station asa motor o low roltage transmitted from said main station Whileindependently driving; said generator by prover at said distant stationthen increasing said voltage and. sa ddrwing power until said distantstation generator operates as a true generator and, delivers energy tosaid main station.

t. A synchronous main transmission auxiliary transmission .1. saidmainline, a. polyphassinduction generator, 0; j ieu thereby, an

ner-

iplant, a, plurality the output oi s'aid' 1 said transnussion lines andmeans at said main generating enerator at said dist-ant.

e iii-branch fmm ator connected tosaiti :uixiliary transmission line,and at a distant power station, means actuated hythe power at saidstation for driving said induction generator, an electric motorconnected in branch to said auxiliary transmission line, and meanscontrolled by said electric motor for regulating" the power actuatingsaid driving means.

5. A synchronous polyphase generator, a

main transmission line supplied thereby, an

auxiliary transmission line in branch from said main line, means forregulating the voltage on said auxiliary transmission line, and at adistant power station, a polyphase induction generator connected to saidauxiliary transmission line, means actuated by the power at said stationfor driving said induction generator, an electric motor connected inbranch to said auxiliary transmission line, and means controlled by saidelectric motor for regulating the power actu ating said driving means.

6. 'A synchronous polyphase generator, a main transmission line suppliedthereby, an auxiliary transmission line in branch from said main line,means for regulating the voltage on said auxiliary transmission line,

a manually operable switch in said auxiliary transmission line, andmeans automatically operating to open said switch upon the occurrence ofan acoidentsuch as a short cir cuit-on the auxiliary transmission line,and at a distant power station, a polyphase induction generatorconnected to said agxiliary transmission line, means actuated by thepower at said station for driving said induction enerator, an electricmotor oonnected'in ranch to said auxiliary transmission line, and meanscontrolled by said electric motor for regulating the power actuatingsaid driving means. I

7. A synchronous polyphase generator, a main transmission line suppliedthereby, an auxiliary transmission line in branch from said main line,means for regulating the voltage on said auxiliary line, and at adistant power station, a polyphase induction generatrn' connected tosaid auxiliary transmission line, means actuated by the power at saidstation for driving said induction generator, an electric motorconnected in branch to said auxiliary transmission line, meanscontrolled by said motor for regulating the power actuating said drivingmeans, and means .for progressively counter-balancing the torque of saidmotor. a

8. A synchronous polyphase generator, a main transmission line suppliedthereby, an auxiliary transmission line in branch'from said main. line,means for regulating the voltage on said auxiliary line, and at adistant station, a polyphase induction generator connected to saidauxiliary transmission line, a hydraulic motor driving said generator, aduct delivering actuating fluid'to said motor, a valve in said duct, andlcctric motor connected in branch to said .auxiliar transmission lineand controlling said va ve to reguthe auxiliary transn'iission line, ma

ulle on said motor shaft controlling the flow oi the n u late the fluidsupply to said hydraulic motor, and means for progressivelycountentalancing the torque of said motor.

9. The combination of claim 8, includr; as the means for regulating thevclta l nualljjf controllable arim-transformer in saio 10. A synchronouspolyphase gen main transmission line supplied their auxiliarytransmission line in llfillCl said main line, means r regulating thevoltage on said auxiliary line, and a. distant station, a polyphaseinduction gen.- eratorconnected to said auxiliary transmission line, ahydraulic motor iriving a generator, a duct delrvern'zg tuating fluid tosaid motor, a rotary valve in duct, an electric motor connected inbranch auxiliary transmission line and I ring its shaft geared to saidValle, a ste cone pulley, and a counter-w by said cord,

11. A main generatii p generating plant distant fr plant, atrai'isniission line connecting :5: plants, means connc in and eratingthrough said transmission 1" causing said auxiliary plant to add its,output through said transmission line to the output of said main plant,and a manually operable device at said main generating plant forcontrolling said. operatir' means,

11 an alternating source of fluid energy driving means, energy-etcactuated means, and in us for trolling the energy-storage mean throughthe main power conductors of the aiterusting-current system.

13. The combination u l current system and a sour for, of an. auxiliarygenerator, iiuh means for driving the rater, a a1 controllingthe rate offluid sup fluidactuated driving means, means enei gized from the iainsystem for con .ollino the position of the valve, and means forin'lpressing upon the system a l. electromoan alternating tive force foroperating valve-ecmtroh ling means.

14. The coinoin: ion with an. alternating current system. and a sourceof energy therefor, of an auxiliary ilui iba'ctuated means for drivingthe generator, a waive for controlling the ,amount of fluid to thefluidaetuated driving means, reversible means for controlling theposition of the valve,

and means, operating through main power'conductors of-said system, forcontroll ng said reversible means,

l V L C6119 erating through the main power conductorsof said system forcontrolling the motor.

16. Iii-u power distributing system, the

combination with a main source ofenergy,

ol? an uuxiliairy generator, at Water-Wheel therefor, e gzite-ralve'forcontrolling the flow of water to the watenwheel, a motor for the valve,means whereby the valve may be controlled in accordance with theenergization of the motor, and means for energizing the motor throughthe main power conductor of the distributing system.

1?. in iflpower distributing system, the' combination with a main sourceof energy, of an auxiliary generator, 9, water-wheel therefor, 21gate-valve for controlling the flow of water to the water wheel, a motorfor controlling the position of thegate valve, means controlled inaccordance "with the direction of rotation of the motor for controllingthe operation of-theyal've, and. means, operative through the 2113.111power conductors of the distributing system, for controlling theoperation of the motorfi 18. In. a power distributing system, thecombination with a no'ein source of energy, of on auxiliar genera-tor,a. water-wheel therefor, u gate-valve for controlling the How of Waterto the n'ater-wlieel, u polyphusc motor energized from the distributionsystem "for controlling the position of the gate-valve, means forcontrolling the direction of rotation of the motor. and meansoperutive'through the main power conductors oi. suitl system forcontrolling the motor.

ii In a power distributing system, the combination with a main source ofenerg of on misilinry generator, u watcr-wheel therefor, 2 gate-relive]for controlling the flow oi water to the hater-wheel, u p0ly phase motorenergizer from the distribution system for contrr-illingthc position ofthe unto-valve, moons j'for closing the gatevulrc when energy 'no longerto be supplied to the rlistrilmti ,n system by the auxiliary generator,mid unions operatiyo through the main power conductors of suul systemfor controlling the operation of the motor to control the operationo't'suill valveclosingmruns.

2!). In a power distr buting system, the combination wilh u llliilllsourciof energy,

of an auxiliary generator, a 'water-wheel therefor, means associatedwith the waterwheel comprising an energy -storagereservoir, agate-,valve for controlling the flow of water to the water-wheel a motorfor controlling the position 'offtli'e gate-valve,

"means, operative through the main power conductors of suic'l-s'ystein,for controlling v the motor, and means -"respon'sive to the conditlon ofthe energy-stora'gereservoir for closing the "gate-valve when energy 'isno longer to be supplied to the dishfibution system by the auxiliarygeneration 21. In a power distributingsystemygth combination with a,main source of energy, of an auxiliary generator, at watewwheel thereforvancla source ofl'wate'r 'power for actuating said wheel,;ii"gate-velve.'-for controlling tho'supply -:of I water to said, wheel,a". motor energized 1' from the 1 distribution system for controlling,the operation of the 'gate valve', and means for causing the motor to'rotate in o direction opposite to that in which its energizatiou fromthe'distribution system istending to causeit'to rotate.

. 22. In. a ,power distributing system, the combination with a mainsynchronous 'generator supplying energy to the system and an auxiliarygenerator .actuuted'by wateractuated-means, oi means-for regulating thesupplyof water to said {water-actuated ,nueans, a, motor energized fromthe system 'for controlling said regulating means, and

means, operating through the main power conductors of the system, tocontrol the -motor.

'23. In a power distributing system, the combination with a mainsynchronous generator supplying energy to the system and an auxiliarygenerator actuated by wateroctuated means, of means whereby themixiliury generator ugly be simultaneouslyen ergized from thedistributing system and operated as a generator by the w atnr-actu utcdmeans, and regulating means whereby the auxiliary generator iscontrolled to assume :1 portion of the load on the system.

24. In combination, a main generating station, un'auxiliury generatingstation, a transmission line adapted to be energized from both stationsand means disposed at the main station for controlling the uuxil-- iarystution to supply energy to the transmission line only whilethetrunsmissiou line is energized.

The method of connecting an alternoting-current generator driven by :ifluidopcrutcd prime mover to an energized power circuit, which comprisesapplying an clcc tricul potential from the energized power circuit tothe generator to start the generator from rest uml simultaneouslycausing the [lui(l-o n-rutc l prime mover to ho suplllitll withoperating fluid, and then simultaneously increasing the electricalpotential applied to the generator and the amount of fluid supplied tothe prime mover.

26. The method of connecting a generator to a transmission line whichcomprises starting the generator from rest and accelerating it tosubstantially synchronous speed by imparting to the generator bothmechanical energy through a prime mover for the genorator and electricalenergy of approximate- 1y normal frequency from the line.

27. The method of connecting an alternating-current generator driven bya fluidoperated prime mover to an, energized power circuit, whichcomprises simultaneously increasing the electrical potential applied tothe generator from the energized power circuit and the, amount otfluidsupplied to the fluid-operated prime'mover, from zero to substantiallythe normal operating values.

28. In a power system, the combination with a main generating station, asecond generating station and a transmission line therebetween, of meansassociated with the second generating station for controlling the supplyof energy by the second station to the system and step-by-step meansoperative through said transmission line for controlling theenergy-controlling means.

29. In an electrical'system of distribution, the combination with a maingenerat ing station, a plurality of auxiliary generating stationsprovidedwith energy-translating apparatus, and a commonpowertransmission circuit to which the respective stations are to supplyenergy, of means for connecting the apparatus of the respective stationsto the power-transmission circuit, means for impressing upon a portionof the transmission circuit an electromot-ire force havingcharacteristics difi'ering from the characteristics of the normaloperating potential of the power circuit and means associated with therespective translating apparatus and responsive to the impressedelectromotive force for selectively controlling the translation ofenergy fromthe associated apparatus to the power circuit.

In testimony whereof, 1 have hereunto subscribed my name this 7th day ofSeptember, 1-921.

SEVERN D. SPRONG.

